look up any word, like fellated:
It is an Arabic word meaning similar to English Mr, man, sir or gentleman. For example it was used to describe one of the Spanish warriors that threw the Moors out of Spain (El-Cid). El-Cid means "the man" or similar.

It is used in Shia Islam for descendants of prophet Muhammad no matter if they are males or females.
Was your father or mother a Seyyed?
by Keyhan November 10, 2006